尽管已登录，但查询 firestore 时 Firebase 身份验证为 null

Question

我使用 Web / JS SDK 和 Firebase 身份验证来对用户进行身份验证（使用电话号码），然后尝试创建一个具有适当安全规则的 Firestore 文档（也使用 Web SDK）。但是，尽管经过身份验证，每个安全规则都会失败，因为请求身份验证由于某种原因为空。在下面的示例中，我尝试创建一个 ID 等于经过身份验证的用户的 uid（由 Firebase 生成）的文档。本例中的 uid 是pbc5l8cca7ELtwM0Kxctn9xLeT2i（它在调试日志记录中可见）。

我的规则：

service cloud.firestore {
  match /databases/{database}/documents {
    // Allow only authenticated content owners access
    match /preferences/{userId} {
        allow read, update: if debug(request.auth) != null && debug(request.auth.uid) == userId;
        allow create: if debug(request) && debug(request.auth) != null;
    }

该行的调试allow create正在打印出请求，奇怪的是标头中有一个承载令牌（如果我在未经身份验证的情况下尝试相同的操作，则该令牌会丢失），但请求的 auth 属性为空。

Apr 16, 2021 6:20:42 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Apr 16, 2021 6:20:42 PM com.google.net.webchannel.server.common.CorsFilter populateCustomHeaders
WARNING: Invalid $httpHeaders: X-Goog-Api-Client:gl-js/ fire/8.4.1
X-Firebase-GMPID:1:855732088727:web:38fc76872a93ee3e979ed2
Content-Type:text/plain
Authorization:Bearer eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJwaG9uZV9udW1iZXIiOiIrMTEyMjMzMzU1NTUiLCJhdXRoX3RpbWUiOjE2MTg2MTE2MjYsInVzZXJfaWQiOiJwYmM1bDhjY2E3RUx0d00wS3hjdG45eExlVDJpIiwiZmlyZWJhc2UiOnsiaWRlbnRpdGllcyI6eyJwaG9uZSI6WyIrMTEyMjMzMzU1NTUiXX0sInNpZ25faW5fcHJvdmlkZXIiOiJwaG9uZSJ9LCJpYXQiOjE2MTg2MTE2MjYsImV4cCI6MTYxODYxNTIyNiwiYXVkIjoiZWFybmhhdXMtc3RhZ2luZyIsImlzcyI6Im0dHBzOi8vc2VjdXJldG9rZW4uZ29vZ2xlLmNvbS9lYXJuaGF1cy1zdGFnaW5nIiwic3ViIjoicGJjNWw4Y2NhN0VMdHdNMEt4Y3RuOXhMZVQyaSJ9.

Apr 16, 2021 6:20:42 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Apr 16, 2021 6:20:42 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
map_value {
  fields {
    key: "auth"
    value {
      null_value: NULL_VALUE
    }
  }
  fields {
    key: "headers"
    value {
      map_value {
      }
    }
  }
  fields {
    key: "inTransaction"
    value {
      bool_value: true
    }
  }
  fields {
    key: "method"
    value {
      string_value: "create"
    }
  }
  fields {
    key: "path"
    value {
      path_value {
        segments {
          simple: "databases"
        }
        segments {
          simple: "(default)"
        }
        segments {
          simple: "documents"
        }
        segments {
          simple: "preferences"
        }
        segments {
          simple: "pbc5l8cca7ELtwM0Kxctn9xLeT2i"
        }
      }
    }
  }
  fields {
    key: "readFields"
    value {
      null_value: NULL_VALUE
    }
  }
  fields {
    key: "resource"
    value {
      map_value {
        fields {
          key: "__name__"
          value {
            path_value {
              segments {
                simple: "databases"
              }
              segments {
                simple: "(default)"
              }
              segments {
                simple: "documents"
              }
              segments {
                simple: "preferences"
              }
              segments {
                simple: "pbc5l8cca7ELtwM0Kxctn9xLeT2i"
              }
            }
          }
        }
        fields {
          key: "data"
          value {
            map_value {
              fields {
                key: "paymentMethod"
                value {
                  string_value: "venmo"
                }
              }
              fields {
                key: "paymentRecipient"
                value {
                  string_value: "+11223335555"
                }
              }
            }
          }
        }
        fields {
          key: "id"
          value {
            string_value: "pbc5l8cca7ELtwM0Kxctn9xLeT2i"
          }
        }
      }
    }
  }
  fields {
    key: "time"
    value {
      timestamp_value {
        seconds: 1618611642
        nanos: 877000000
      }
    }
  }
  fields {
    key: "transforms"
    value {
      null_value: NULL_VALUE
    }
  }
  fields {
    key: "writeFields"
    value {
      null_value: NULL_VALUE
    }
  }
}

null_value: NULL_VALUE

Apr 16, 2021 6:20:42 PM com.google.cloud.datastore.emulator.impl.util.WrappedStreamObserver onError
INFO: operation failed: 
false for 'create' @ L7

它为空的事实使得无法执行任何安全规则。我究竟做错了什么？